I love ogling these crazed homebrewed audio power amps that people build. This one is based on Jean Hiraga’s 20W Class-A Amplifier, but it’s been tricked out further to become the “Super Class A 30W Amplifier.” Check out those monster caps. Those are six 220000 uF capacitors (1.2 Farads!) and (in the center) that’s a […]
Peter Redmer, of Caffeinated Pixels, is one happy little wirehead. For Christmas this year, his dad, an electrical engineer, built him a tube amp and a set of speakers for his iPod. Here’s dad on the specs: Amplifier: In order to keep the design small, I am using a hybrid design for the amplifier. A […]
Turn two salad bowls into a spherical array, ball of sound with amazing results. Pick up MAKE Volume 11 for other great projects.
http://www.makershed.com/ProductDetails.asp?ProductCode=0596513879
Do you have an extra mp3 player or four in the house? Do your kids like to hear your bedtime stories? How about archiving them and setting up your kid with an audio player that will allow him or her to play them back at any time? With a couple of computer speakers, or a […]
iOscilloscope displays the iPhone’s mic in as waveform with fast fourier transform or Sonogram modes – iOscilloscope For a more advanced view check out SignalScope – Analyze signals coming from the iPhone’s built-in or headset microphone, or from the built-in accelerometer. Zoom in or out on spectrum and waveform displays with two-finger expand/pinch gestures, even […]
If you’re familiar with the audio spotlight, then you now how very awesome narrow beam ultrasonic speaker devices can be. They can project a sound efficiently over long distances without spreading like common speakers. One can essentially walk into the ultrasonic line-of-fire and begin to hear sound abruptly – certainly an interesting effect. Though not […]
Simon writes – This is a little music box I created using a HK828 voice recorder and playback IC. This one chip allows you to record and play back 30 to 60 seconds of audio (depending on the quality) with a minimum of components quite easily. I made a simple ‘A Team music box’ but […]
